1. The attending veterinarian asks you to administer 120 mg of enrofloxacin
(Baytril) IV slow over 20 minutes to a dog that is hospitalized in your clinic. The
strength of injectable enrofloxacin is 2.27%, how many mil
...
1. The attending veterinarian asks you to administer 120 mg of enrofloxacin
(Baytril) IV slow over 20 minutes to a dog that is hospitalized in your clinic. The
strength of injectable enrofloxacin is 2.27%, how many milliliters of drugwill you
administer?
Answer: 5.3 ml
A 2.27% solution is 22.7 mg/ml. 120 mg divided by 22.7 mg/ml = 5.3 mls
2. A 120-pound Great Dane has presented with Gastric Dilatation Volvulus. The
clinician has asked you to quickly prepare the drug protocol. As a premedica-tion,the
dog is to receive 0.08 mg/kg of Hydromorphone. How many milligrams will you
administer?
Answer: 4.4 mg
To calculate milligrams administered the dog's body weight should be convertedto
kilograms. As a general rule, the majority of medications are dosed in a mil- ligramper-kilogram dosing. Therefore all body weights need to be converted to kilograms
so that you are working in the same units.
120 lb/2.2 = 54.5 kg (There are 2.2 lbs per kilogram)
54.5 kg x (0.08 mg/kg) = 4.4 mg (Notice the "kg" will cancel out when you do the
math)
If your answer was 9.6 mg, you did not convert the body weight into kilograms.
3. How many milligrams are in 100 ml of a 3% solution?
Answer: 3,000 mg
A 3% solution is equal to 30 mg/mL.
Now take 100 mL X 30 mg/mL = 3000 mg= 3 grams (since there are 1000 mg in 1
gram)
4. How many milliliters should be administered to a 100-kg patient that needs50 mg
of a 2.5% solution?
Answer: 2 ml
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